Securing artificial teeth



miran STATES Pagan carica".

N. B. SLAYTON,` OF MADISON, INDIANA.

SECURING ARTIFICIAL TEETI-I.

Specification of Letters Patent No. 25,053, dated August 9, 18159.

To all whom it may concern:

Be it known that I, N. B. SLAYToN, of IWIadison, in the county ofJefferson and State of Indiana, have invented a new and usefulImprovement in Modes of Securing- Artificial Teeth Upon Plates of Goldand Silver; and I do hereby declare that the following is a full andclear description there of, reference being had to the accompanyingdrawings and to the letters of reference marked thereon and made to forma part of this specification.

The nature of my invention relates, first, to the securing of artificialteeth upon plates of gold and silver, by means of an amalgam, of gold,or silver, or both, combined with mercury, as hereinafter set forth. 2d,forming, of said amalgam an outer flange, or rim, which may constitute astep or recess in which the base of the teeth may rest, and at the sametime afford additional strength and support to the setting of the teethas hereinafter specified and represented.

In reference to the accompanying drawings Figure l, is a perspectiveview of a set of artificial teeth, secured to a plate in accordance withmy invention and provided with the outer flange or rim. Fig. 2, is aperspective view showing, the manner of securing the teeth, and fittingthe interstices between and around them. Fig. 3, is a sectional viewshowing the manner of securing the teeth. Fig. 4, is a sectionalelevation of the plate, with a portion of the teeth removed.

(A) represents a plate formed in the ordinary method of gold or silver(a) represents the outer flange or rim (formed of the amalgam) ashereinafter described extending from the body of the plate (A)sufficiently to form a step or recess, in which the base of the teeth(b) may rest.

(c) clearly shown in Fig. 3, is a metallic rod, attached to the teeth(b) and extending therefrom, in the form of a hook around which theamalgam is packed while in a plastic state, and by means of which theteeth are more firmly secured.

(d) Fig. 2, shows the manner of building up the backing of the teeth andfilling the interstices between them by means of the amalgam.

(f) Fig. el shows the bearing the amalgam aords to the back of theteeth.

The operation of securing teeth upon a plate of gold or silver by meansof my invention may be described as follows: The plate will be s truckand fitted, to the mouth the articulation secured, and the teeth groundto lit, in the ordinary manner. The teeth will then be properly fittedto their places upon the plate (A). The outside of the teeth and plate,will' then be invested in a preparation of asbestos and plaster ofparis, or other suitable composition, for properly securing the teeth totheir places. The plate (A) upon the inside, or, back of the teeth willthen be well cleaned, in order to remove all foreign substances, and abrass or silver wire brush, first dipped in a solution of nitrate ofmercury and then in pure mercury, will be passed over the plate (A) atthe points where the amalgam is desired to adhere, until those pointsare perfectly silvered over. Gold or silver or both, combined, properlyprepared by precipitation, or other mode, with mercury and welltriturated, will be placed in a buck skin, or other suitable sack, andthen in a vise, and all the mercury possible pressed out in that manner.The amalgam is then again triturated, and with proper instruments packedaround the backs of the teeth, embedding, the hooked rod or wire (c) andperfectly fitting all the interstices between the teeth, and forming theback as shown in Fig. 2 (d). The finish is made complete, as noallowance is necessary for shrinkage. The inside or back of the teethare now invested with the preparation before described, in such manneras to cover all the amalgam. The said preparation will then be removedwith a suitable sharp instrument, from the outer edge of the plate, andsuch portion of the teeth as are to be covered by the flange or rim (a).The outer edge of the plate will then be treated in the manner beforedescribed, and the rim (a) formed of the amalgam, in a manner preciselysimilar, to the backing upon the inside of the teeth, as above setforth. The finish now being complete, the outside of the plate and, therim formed as aforesaid, will be again invested in said preparation ofasbestos and plaster of paris, so as to completely cover all theamalgam, two slight perforations being made in said preparation ateither end of the row of teeth, to permit the escape of the mercury. Thewhole will then be placed in an oven, or other suitable vessel for thepurpose, and subjected to a heat of at least seven hundred degrees andkept there for,

from tWo to four hours, until the mercury is entirely driven off. Theamalgam Will then have adhered to the plate in such a manner as to formpart of the same, and the teeth Will be secured in the most perfectmanner. Should greater strength be required, after the heating process,the amalgam may be Washed in a solution of boraX, and gold or silversolder applied. The Whole Will then be subjected to heat suflicient tosmelt the solder, Which Will flow freely through the cells, vacated bythe mercury, thereby f0rming a perfect union of the plate and, amalgam,in one solid mass of metal.

Among other advantages secured by means of my invention, one importantone is, that the juices of the mouth, and food are prevented fromentering the interstices ing, and supporting the base of the teeth,

and thereby generating 'an offensive taste 20 and smell bydecomposition.

What I claim as my invention and desire to secure by Letters Patent isl.Securmg artificial teeth upon plates of gold or silver, by means of anamalgam of 25 gold or silver, or both, substantially as here indescribed for the purposes set forth.

2. I claim forming, by means of said amalgam, an outer flange or rim(a), covering, and supporting the base of the teeth, 30

H. E. CLIFTON, C. I. SHIPLEY.

